GST on Works Contract: Classification, Rate, and ITC Issues Explained

Works contract is one of the trickiest areas in GST. The classification determines the rate, the ITC eligibility, and even whether composition scheme applies. After handling multiple GST audits in the construction sector, here is a practical explainer.

WHAT IS WORKS CONTRACT UNDER GST?
Schedule II of the CGST Act defines works contract as a contract for building, construction, fabrication, erection, installation, fitting out, improvement, modification, repair, renovation, or commissioning of any immovable property where transfer of property in goods is involved.

Key point: Works contract is treated as a SUPPLY OF SERVICE (not goods, not composite supply). This classification matters for rate and ITC.

GST RATES ON WORKS CONTRACT
18% — Standard rate for most works contracts (commercial buildings, industrial construction)
12% — Works contract for affordable housing (carpet area up to 60 sqm in metro, 90 sqm in non-metro, value up to Rs 45 lakh)
12% — Works contract for government entities for certain specified purposes
5% — Works contract for construction of low-cost houses under government housing schemes (PMAY etc.)

THE ITC RESTRICTION — THIS IS WHERE IT HURTS
Section 17(5)(c) and (d) of CGST Act restricts ITC on:
- Works contract services when used for construction of immovable property ON OWN ACCOUNT (not for further supply)
- Goods or services used for construction of immovable property on own account

What this means: If you are a developer building apartments for sale — you CAN claim ITC on works contract received. If you are a company getting your office building constructed — you CANNOT claim ITC.

COMMON DISPUTES
1. Is it works contract or pure service? If no transfer of property in goods is involved (e.g., pure labour for repair), it may be classified as pure service at different rates. The distinction is critical.
2. Composite supply vs works contract: If you supply equipment + installation, is it works contract or composite supply of goods? The answer depends on whether the end result is immovable property.
3. ITC on renovation: A company renovating its rented office — can it claim ITC? The restriction applies to construction on own account. Renovation of rented premises is arguable — some advance rulings have allowed ITC, some have denied.

PRACTICAL ADVICE FOR CONTRACTORS
Issue proper tax invoices with SAC code 9954 (construction services). Maintain records of material and labour components separately — this helps in audits and valuation disputes.